The anomalous hanle effect in semimagnetic semiconductor quantum wells. / Kudinov, A. V.; Kusraev, Yu G.; Merkulov, I. A.; Kavokin, K. V.; Aksyanov, I. G.; Zakharchenya, B. P.
In: Physics of the Solid State, Vol. 45, No. 7, 01.07.2003, p. 1360-1373.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - The anomalous hanle effect in semimagnetic semiconductor quantum wells
AU - Kudinov, A. V.
AU - Kusraev, Yu G.
AU - Merkulov, I. A.
AU - Kavokin, K. V.
AU - Aksyanov, I. G.
AU - Zakharchenya, B. P.
PY - 2003/7/1
Y1 - 2003/7/1
N2 - The behavior of the optical-orientation signal under resonant optical excitation of localized excitons in quantum wells with semimagnetic layers was studied both experimentally and theoretically. The most remarkable experimental observation made in this study is the increase in the degree of polarization of the quantum well radiation in the conditions in which the Hanle effect is observed. The behavior of magnetically induced circular luminescence polarization in a slightly tilted field (quasi-Voigt geometry) also appears unusual. Possible specific contributions to the optical exciton orientation in semimagnetic nanostructures are discussed. A theoretical model is proposed which, while being based on the well-known concepts of collective spin dynamics of magnetic ions in the exchange field of a photoexcited hole, takes into account fluctuations of the local magnetization. The calculations agree quantitatively with experiment for reasonable values of the parameters.
AB - The behavior of the optical-orientation signal under resonant optical excitation of localized excitons in quantum wells with semimagnetic layers was studied both experimentally and theoretically. The most remarkable experimental observation made in this study is the increase in the degree of polarization of the quantum well radiation in the conditions in which the Hanle effect is observed. The behavior of magnetically induced circular luminescence polarization in a slightly tilted field (quasi-Voigt geometry) also appears unusual. Possible specific contributions to the optical exciton orientation in semimagnetic nanostructures are discussed. A theoretical model is proposed which, while being based on the well-known concepts of collective spin dynamics of magnetic ions in the exchange field of a photoexcited hole, takes into account fluctuations of the local magnetization. The calculations agree quantitatively with experiment for reasonable values of the parameters.
UR - http://www.scopus.com/inward/record.url?scp=0042430616&partnerID=8YFLogxK
U2 - 10.1134/1.1594256
DO - 10.1134/1.1594256
M3 - Article
AN - SCOPUS:0042430616
VL - 45
SP - 1360
EP - 1373
JO - Physics of the Solid State
JF - Physics of the Solid State
SN - 1063-7834
IS - 7
ER -
ID: 39913182